Loading Linear Arrays of CuII Inside Aromatic Amide Helices. Issue 34 (1st July 2021)

• Record Type: Journal Article
• Authors: Wang, Jinhua; Wicher, Barbara; Méndez‐Ardoy, Alejandro; Li, Xuesong; Pecastaings, Gilles; Buffeteau, Thierry; Bassani, Dario M.; Maurizot, Victor; Huc, Ivan
• Is Part Of: Angewandte Chemie international edition. Volume 60:Issue 34(2021)
• Page Start: 18461
• Page End: 18466
• Publication Date: 2021-07-01
• Subjects: CuII coordination -- electron transport -- helix -- metallofoldamers -- self-assembled monolayers; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.202104734
• Languages: English
• ISSNs: 1433-7851

Abstract

Abstract: The very stable helices of 8‐amino‐2‐quinolinecarboxylic acid oligoamides are shown to uptake Cu II ions in their cavity through deprotonation of their amide functions with minimal alteration of their shape, unlike most metallo‐organic structures which generally differ from their organic precursors. The outcome is the formation of intramolecular linear arrays of a defined number of Cu II centers (up to sixteen in this study) at a 3 Å distance, forming a molecular mimic of a metal wire completely surrounded by an organic sheath. The helices pack in the solid state so that the arrays of Cu II extend intermolecularly. Conductive‐AFM and cyclic voltammetry suggest that electrons are transported throughout the metal‐loaded helices in contrast with hole transport observed for analogous foldamers devoid of metal ions. Abstract : Very stable helices of oligoamides take up Cu II ions in their cavity through deprotonation with minimal alteration of their shape, unlike most metallo‐organic structures which generally differ from their organic precursors. The outcome is the formation of intramolecular linear arrays of up to 16 Cu II centers, forming a molecular mimic of a metal wire completely surrounded by an organic sheath.